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Aqa Handbook

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Total cards: 8•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (8)

#1
Front (Question)

When assessing uncertainty, there are a number of issues that have to be considered. These include:

Back (Answer)

 the manufacturer’s tolerance on instruments  the judgments that are made by the experimenter  the procedures adopted (eg repeated readings)  the size of increments available (eg the size of drops from a pipette).

#2
Front (Question)

Reading

Back (Answer)

the values found from a single judgement when using a piece of equipment Eg ph meter Thermometer Top pan balance Measuring cyclinder Volumetric flask

#3
Front (Question)

Measurinement

Back (Answer)

the values taken as the difference between the judgements of two values. Eg ruler Stopwatch analogue meter

#4
Front (Question)

How to decrease uncertainty

Back (Answer)

Repeated measurements Choosing appropriate equipment

#5
Front (Question)

Why is it good to take mmultiple readings

Back (Answer)

You can easy with identifyi exceptional answers

#6
Front (Question)

Experimental error in a titration

Back (Answer)

. For example, the wrong volume of solution added from the burette, the wrong amount of solution measuring the pipette or the end point might have been misjudged.

#7
Front (Question)

Formula for percentage uncertainty

Back (Answer)

percentage uncertainty = |best gradient−worst gradient dividented by best gradient then X| 100%

#8
Front (Question)

What should be considered when drawing the line of best fit?

Back (Answer)

Are the data likely to be following an underlying equation (for example, a relationship governed by a physical law)? This will help decide if the line should be straight or curved.  Are there any anomalous results?